23results about How to "High boiling point" patented technology

The invention relates to the technical field of fluorine-containing chemicals, and provides a perfluoroketone compound as well as a preparation method and application thereof, the structural formula of the perfluoroketone compound is as shown in # imgabs0 #, and Rf1, Rf2 and Rf3 are the same or different and are independently selected from C1-C8 straight-chain or branched-chain perfluoroalkyl groups. The perfluoroketone has the beneficial effects that the carbon number of the perfluoroketone is controllable, and perfluoroketones with different boiling points can be obtained according to requirements; according to the method for preparing the perfluoroketone compound, the adopted raw materials are low in cost, good in safety and stability, non-toxic, harmless and easy to store, the reaction process is controllable, the selectivity is high, products are easy to separate, aftertreatment is simple, and the method is suitable for actual technological production; the perfluoroketone provided by the invention has a relatively low dielectric constant and relatively good heat transfer performance, is non-combustible, and has a very good application prospect in the aspects of semiconductors, refrigeration systems and fire fighting.

The invention provides photocuring 3D printing silicone rubber ink and a preparation method and a printing method thereof. The photocuring 3D printing silicone rubber ink comprises the following components in parts by mass: 100 parts of vinyl polysiloxane; 4 to 29 parts of sulfydryl grafted polysiloxane; 10 to 50 parts of surface modified fumed silica; 0.1 to 0.5 part of a photoinitiator; 1-5 parts of a light absorber; and 10-220 parts of a diluent. According to the photocuring 3D printing silicone rubber ink, firstly, sulfydryl grafted polysiloxane serves as a cross-linking agent and is cross-linked with vinyl terminated polysiloxane to form a silicone rubber elastomer, secondly, the mechanical property of the silicone rubber elastomer is enhanced through surface modified fumed silica, and then the viscosity of the silicone rubber elastomer is adjusted through the diluent; and finally, the curing depth of the silicone rubber elastomer is adjusted through the light absorber, so that the ink suitable for photocuring 3D printing is obtained, and the contradiction that high mechanical property and low viscosity of traditional photocuring 3D printing silicone rubber cannot be achieved at the same time is overcome.

The invention discloses a method for extracting and recycling white oil in waste lithium battery diaphragms, and relates to the technical field of lithium battery recycling. The method comprises the following steps: S1, adding crushed waste films and a white oil extraction agent into a closed system for extraction, and discharging an extraction mixed solution after the extraction is completed; s2, filtering the extraction mixed liquid discharged in the step S1, performing low-temperature evaporation on the liquid, condensing the evaporated extraction agent into a liquid state, recycling the liquid state to the step S1, and obtaining the white oil which is completely evaporated and is left at the bottom of the evaporator. According to the method, the high-boiling-point white oil extraction agent is adopted and is not prone to volatilization at the normal temperature, the recovery rate is higher, the extraction white oil and the extraction solvent are separated, recovered and extracted at the specific evaporation temperature and under the negative pressure through low-temperature evaporation, the extraction solvent is recovered through low-temperature evaporation, cyclic utilization of the extraction liquid can be achieved, and loss of the extraction agent is reduced.

The invention discloses a method for recovering dimethyl ether from dimethyl ether purge gas, and belongs to the technical field of dimethyl ether recovery, the method for recovering dimethyl ether from dimethyl ether purge gas comprises the following steps: cooling the dimethyl ether purge gas to 8-10 DEG C through heat exchange of a heat exchanger, and then discharging to obtain low-temperature purge gas, the low-temperature purge gas enters the bottom of the inner side of an absorption tower filled with composite filler and is absorbed by absorption liquid which flows from top to bottom and has the temperature of 10-15 DEG C, and enriched liquid is formed at the bottom of the absorption tower; according to the method, the composition and the adsorption temperature of the adsorption liquid are optimized, and the composite filler is modified, so that the recovery purity of the dimethyl ether is effectively improved, and the recovery rate of the dimethyl ether in the purge gas is also improved.

The invention discloses an extraction device and an extraction method of star anise essential oil, and belongs to the technical field of vegetable oil extraction. The extraction device provided by the invention comprises a round-bottom flask, an air condensation pipe, a distillation head, a condensation pipe, a receiving pipe and a receiving bottle, the opening of the round-bottom flask is connected with the bottom of the air condensation pipe; the top of the air condensation pipe is connected with a bottom end pipe of the distillation head; a side end pipe of the distillation head is connected with the top of the condensation pipe; the bottom of the condensation pipe is connected with the top of the receiving pipe; inserting the tail part of the receiving tube into a receiving bottle; and a polymeric membrane is loaded at the top of the air condensation pipe. According to the extraction device and the extraction method of the star anise essential oil, the problems of long time consumption, large steam consumption and high energy consumption in a traditional extraction process are solved, and meanwhile, the extraction rate of the star anise oil and the extraction rate of the effective component anethole are greatly improved.

The present application relates to the field of chemical and chemical technology, and in particular to a method for synthesizing sodium azide. It can solve the problems of long reaction time, low production efficiency, many by-products, large pollution emissions, and high safety hazards in the sodium azide preparation process in the related technology. A method for synthesizing sodium azide, comprising: using aromatic alcohol as a raw material to prepare nitrite ester of aromatic alcohol; under alkaline conditions, allowing nitrite ester to undergo a reduction reaction with hydrazine hydrate to prepare sodium azide; wherein the aromatic alcohol comprises: one or more compounds represented by the structural formula: #imgabs0#, wherein Ar is selected from the following substituted or unsubstituted C6~C 20 Aryl and substituted or unsubstituted C3~C 10 Any one of the heteroaryl groups, R is selected from #imgabs1#n is an integer of 1 to 3; wherein, in #imgabs2#, R1 and R2 are the same or different and are independently selected from any one of H and C1 to C3 alkyl groups; when Ar is selected from substituted C6 to C 20 Aryl or substituted C3~C 10 In the case of heteroaryl, the substituted substituent is selected from C1-C9 alkyl, and * indicates the attachment site.

The invention discloses an organic-inorganic hybrid antimony-based nonlinear optical crystal material as well as a preparation method and application thereof, and belongs to the technical field of optical materials. DMSO has high polarity, high boiling point, good thermal stability and good solubility, the DMSO becomes an appropriate reaction solvent in a Sb < 3 + > system due to the characteristics, meanwhile, oxygen atoms or sulfur atoms on the DMSO have nucleophilicity, so that the DMSO has alkalinity and coordination and can form coordinate bonds with metal cations, and therefore, the DMSO can also be used as a reactant, and the Sb < 3 + > system can be used for preparing the Sb < 3 + > system. The triangular pyramid structure can enrich the structure of the Sb-based compound. According to the invention, dimethyl sulfoxide (DMSO) is taken as a solvent, and a solvent evaporation method is adopted to grow the crystal, so that the problem of hydrolysis of Sb < 3 + > is effectively avoided, the research thought and method of Sb < 3 + > are broadened, and structural distortion is increased due to introduction of DMSO, so that the optical performance of the compound is improved.

The application belongs to the technical field of power generation, and particularly relates to a power supply device for automobile range extension, and more particularly to a direct-current power generation system and a working method thereof. The direct-current power generation system acquires the power of a power generation part in real time through a control module. When the power changes, the control module controls a pressurizing part to pressurize a power part cooling loop, and controls a connecting part to connect the power part cooling loop and the power generation part cooling loop, so that the high-pressure gas in the power part cooling loop enters the power generation part cooling loop, the gas pressure in the power generation part cooling loop is increased, the boiling point of the cooling liquid in the power generation part cooling loop is increased, and the cooling requirements of the power generation part and the power part are simultaneously met. When the power of the power generation part changes, the gas pressure in the power generation part cooling pipeline is increased, the boiling point of the cooling liquid therein is increased, and the cavitation effect caused by the local temperature rise and boiling of the cooling liquid due to the local eddy current caused by the power change is avoided.

The present application belongs to the technical field of lithium primary battery, and particularly relates to a preparation method of lithium primary battery electrolyte, which comprises the following steps: dissolving lithium nitrate in acetone and fully stirring to make the lithium nitrate fully dissolved until the solution is clear and transparent; adjusting the lithium salt concentration in the solution to 1.5-2 mol / L; adding fluoroethylene carbonate and fully stirring until the solution is clear and transparent; in the solution, the volume ratio of fluoroethylene carbonate to acetone is 1:1-1:3; finally, adding propylene carbonate and fully stirring until the solution is clear and transparent; in the solution, the volume ratio of propylene carbonate to acetone is 1:2-1:4. The present application ensures that the electrolyte has high conductivity and can bear high efficient transportation of lithium ions, effectively increasing the discharge specific capacity and specific energy of the battery. In addition, the present application further provides a lithium primary battery electrolyte.

A temperature control device suitable for supercritical CO2 waterless dyeing equipment comprises a heat conduction oil device and an ethylene glycol refrigerating fluid device, the heat conduction oil device comprises a heat conduction oil inlet pipeline, a heat conduction oil pipeline and a heat conduction oil outlet pipeline, the heat conduction oil pipeline is arranged in a supercritical CO2 dyeing system, and the ethylene glycol refrigerating fluid device is arranged in the heat conduction oil pipeline. The heat-conducting oil inlet pipeline and the heat-conducting oil outlet pipeline are correspondingly connected to the front end and the rear end of the heat-conducting oil pipeline respectively; the ethylene glycol refrigerating fluid device comprises an ethylene glycol refrigerating fluid supply pipeline and an ethylene glycol refrigerating fluid backflow pipeline, ethylene glycol refrigerating fluid in the ethylene glycol refrigerating fluid supply pipeline exchanges heat with heat conduction oil in the heat conduction oil inlet pipeline, and the ethylene glycol refrigerating fluid after heat exchange is output through the ethylene glycol refrigerating fluid backflow pipeline. According to the supercritical CO2 dyeing system, the ethylene glycol refrigerating fluid device is additionally arranged to carry out heat exchange on the heat conduction oil inlet pipeline at the front end of the supercritical CO2 dyeing system, so that the temperature of heat conduction oil is controlled, and the situation that after dyeing is completed, the supercritical CO2 dyeing system is still continuously heated, and consequently the color of a product changes is avoided.

The invention relates to the technical field of organic silicon cooling liquid, and discloses poly (trialkyl silicon) substituted siloxane, a preparation method thereof and application of the poly (trialkyl silicon) substituted siloxane in immersion cooling liquid, the preparation method comprises the following steps: trialkyl silicon acetate and alkoxy silane are subjected to transesterification under the action of a catalyst, and the poly (trialkyl silicon) substituted siloxane is obtained. The poly (trialkyl silicon) substituted siloxane is obtained. The prepared poly (trialkylsilane) substituted siloxane is low in viscosity, high in boiling point, high in flash point, low in freezing point and good in stability, does not need to be compounded with a fluorinated liquid, can be independently used as an immersion cooling liquid and is applied to immersed heat dissipation of a chipset, and the preparation method is simple, efficient and suitable for large-scale production.

The invention provides a method for preparing lithium bisfluorosulfonyl imide, which uses tritylamine as a nitrogen source, wherein a large trityl electron-donating group increases the reactivity of the amine, and an organic solvent neutralizes a fluorosulfonyl compound and reacts in a strongly alkaline environment, and then undergoes extraction, dehydration, and decolorization treatment, and concentrated crystallization to obtain a trityl bisfluorosulfonamide intermediate with a high yield. The intermediate is dissolved in an organic solvent, and catalytic hydrogenation is performed to obtain bisfluorosulfonyl imide acid. The intermediate is reacted with a lithium source to obtain lithium bisfluorosulfonyl imide. The lithium bisfluorosulfonyl imide is obtained by recrystallization and purification to obtain battery-grade lithium bisfluorosulfonyl imide. The invention uses tritylamine as a nitrogen source to react and prepare bisfluorosulfonyl imide, and has high reactivity, a mild route, simple separation and purification, and is conducive to industrial production.

A wide temperature range deep eutectic electrolyte and its preparation method and application belong to the field of chemical power source technology. The scheme is as follows: the wide temperature range deep eutectic electrolyte is composed of ethylene carbonate, succinonitrile and alkali metal ion salt, wherein the mass ratio of succinonitrile to ethylene carbonate is 4:6 to 6:4, and the concentration of alkali metal ion salt is 2.5 to 4 mol / L. The preparation method is as follows: Ethylene carbonate and succinonitrile are melted separately, mixed evenly, and cooled to obtain a deep eutectic solvent; alkali metal ion salt is added to the deep eutectic solvent and stirred until completely dissolved to obtain a wide temperature range deep eutectic electrolyte. The wide temperature range deep eutectic electrolyte is used in alkali metal ion batteries. The present invention prepares a deep eutectic solvent with low viscosity, low freezing point, high boiling point and high electrochemical stability, and then composites a high-concentration alkali metal ion salt to obtain a deep eutectic electrolyte with a wide liquid range to meet the working requirements of wide temperature range alkali metal ion batteries.

The invention provides a cooling structure and a machine tool cooling system.The cooling structure comprises a heat exchanger, the heat exchanger is provided with a first heat exchange pipeline and a second heat exchange channel which are relatively independent, and the two ends of the first heat exchange channel are used for being connected with a to-be-cooled component so that a cooling medium can be input into the to-be-cooled component to cool the to-be-cooled component; the cooling medium for cooling the to-be-cooled part is subjected to heat exchange through the second heat exchange channel; the first heat exchange channel comprises a first flow channel and a second flow channel which are relatively independent so that two different cooling media can flow in the first flow channel and the second flow channel correspondingly. The inlet end and the outlet end of the cooling assembly are used for communicating with the two ports of the second heat exchange channel, so that a refrigerant is input into the second heat exchange channel, and the cooling medium located in the first heat exchange channel is cooled; the problem that in the prior art, when multiple cooling media are used for cooling a machine tool, multiple coolers need to be arranged is solved.

The utility model discloses a honeycomb-shaped rice crust rice cooker inner container structure which comprises an inner container pot body, an inner container pot face and an overflow tank body, the inner container pot body is covered and sealed by the inner container pot face to form a heat conduction oil cavity, regular hexagon cone-shaped barrel grooves which are evenly distributed and concave towards the heat conduction oil cavity are formed in the inner container pot face, and the overflow tank body is located over the inner container pot body. An overflow opening and a backflow opening are formed in the center of the pot face of the inner container, an overflow pipe is led into the overflow opening to the top in the overflow tank body, and the backflow opening is connected to a center hole in the bottom of the overflow tank body through a backflow pipe. According to the utility model, the overflow structure in the prior art is vertically arranged above the inner container pot body instead of being horizontally arranged on the side surface of the inner container pot body, the overflow port is changed from the upper part of the side wall of the pot body to the central point of the pot surface, and the overflow mode is changed from normal-pressure automatic overflow to high-pressure passive pressure flow, so that the structural safety and the operation convenience are improved. Meanwhile, the heat-conducting oil cavity of the inner container pot body is filled with the energy-saving hollow round balls, so that the filling amount of the heat-conducting oil is small, and the purpose of improving energy conservation is achieved.

The application discloses a kind of crosslinking degree of crosslinked polyethylene testing methods, it is related to the technical field of material detection.A kind of crosslinking degree of crosslinked polyethylene testing methods, comprising the following steps: (1) the screen mesh is wrapped PE-X sample is placed into extraction instrument, solvent is injected to extract, extraction atmosphere is nitrogen atmosphere, extraction temperature is 150-200 DEG C, extraction pressure is 10-15MPa, extraction time is 3-10min;After extraction, remove solvent, this is one extraction;(2) repeat one extraction multiple times after PE-X sample is extracted completely and is extracted with solvent with uncrosslinked portion, and nitrogen is used to the remaining sample is purged;Remaining sample is taken out and dried, and the crosslinking degree of crosslinked polyethylene is calculated.The testing method disclosed in the application has the advantages of easy operation, short testing time, accurate testing result and the like, effectively solves the problem that the result of PE-X crosslinking degree is obtained for a long time in actual production, realizes the timely monitoring of product quality in production process.

The invention provides a low-sensitization epoxy resin curing agent and a preparation method thereof, and relates to the technical field of curing agent preparation. The preparation method of the low-sensitization epoxy resin curing agent comprises the following steps: respectively taking aliphatic amine and halogenated phenyl thiourea, mixing, heating to 90-120 DEG C, keeping the temperature for 3-5 hours, then carrying out negative pressure distillation under-0.08 MPa to-0.1 MPa, and cooling the reaction system to obtain the low-sensitization epoxy resin curing agent, and the low-sensitization epoxy resin curing agent is relatively low in sensitization.

The invention relates to a high-pressure-resistant long-acting stable two-component insulating coating and a preparation method thereof, and belongs to the field of insulating material preparation, and the high-pressure-resistant long-acting stable two-component insulating coating is composed of a film-forming agent, an oxidizing agent, a reducing agent, a promoter, a nanofiller and a leveling agent. The film forming agent is prepared from dodecafluoroheptyl methacrylate, tridecafluorooctyl methacrylate, tridecafluorooctyl acrylate, laurate methacrylate and trimethylolpropane trimethacrylate. According to the coating, fluorine-containing acrylic resin is mainly used as a main film forming substance, a redox system curing agent is compounded to form a double-component coating, a certain amount of insulating filler and additives are added into the double-component coating, coating curing is initiated through free radical polymerization, and the insulating property of the double-component coating is improved.

A PK polymerization system comprises a polymerization kettle, an extraction kettle and an extraction tower, a raw material inlet, a catalyst inlet and a first vapor phase outlet are formed in the top of the polymerization kettle, the raw material inlet is connected with an ethylene source, a propylene source, a carbon monoxide source and an N-methyl pyrrolidone source through a micro-interface reactor, and the catalyst inlet is connected with a catalyst source. The vapor phase outlet is connected with a first gas-liquid separator, a kettle bottom discharge port of the polymerization kettle supplies materials to the extraction kettle, the top of the extraction kettle is provided with a desalted water inlet and a second vapor phase outlet, the second vapor phase outlet is connected with a second gas-liquid separator, and a kettle bottom discharge port of the extraction kettle supplies materials to the extraction tower. Gas-phase outlets of the first gas-liquid separator and the second gas-liquid separator flow back to the polymerization kettle through a recovery compressor and a cooler, liquid-phase outlets of the first gas-liquid separator and the second gas-liquid separator flow back to the polymerization kettle and the extraction kettle respectively, and a tower bottom discharge port of the extraction tower discharges PK to the outside. The continuous production device is simple in structure and low in maintenance cost, continuous production of the PK polyketone resin is achieved, and the competitiveness of the polyketone resin in the engineering plastic market is improved.

The invention relates to the technical field of chlorpyrifos missible oil preparations, and particularly discloses a preparation method of an efficient and environment-friendly chlorpyrifos missible oil preparation. Comprising the following operation steps: S1, uniformly mixing a chlorpyrifos active compound, an ester compound and an alcohol ether organic solvent, and heating and stirring to obtain a mixed solution A; s2, adding a mixed emulsifier into the mixed solution A, and continuously and uniformly stirring to obtain a mixed solution B; and S3, adding an epoxy compound into the mixed solution B, and continuously and uniformly stirring to obtain the efficient environment-friendly chlorpyrifos missible oil preparation.

This invention relates to the fields of non-ferrous metallurgical engineering, industrial circulating water treatment, and industrial artificial intelligence control technology. It discloses an intelligent heat-fluid coupled variable pressure circulating water system and a full-lifecycle scale prevention method and system. The method includes: the system powering on to generate a real-time state vector that has undergone quality verification; the real-time state vector being pushed to an edge computing unit or PLC coprocessor, outputting predicted values ​​of key thermal and water quality quantities within a future prediction window; obtaining risk prediction results and anomaly diagnosis conclusions; inputting the risk prediction results and anomaly diagnosis conclusions to an integrated setter, which is continuously updated in each strategy cycle based on constraint priority and safety coverage logic; and the updated sewage discharge setpoints and chemical dosing setpoints being sent to the heat-fluid coupled execution layer and the water quality dynamic balance execution layer. This invention effectively improves the operating efficiency and safety of the circulating water system, reduces maintenance costs, and extends the service life of the equipment.

The invention discloses an electric heating element, and belongs to the technical field of heating elements, the electric heating element comprises a ceramic liner, a ceramic sleeve, an electric heating alloy part, a metal tube shell, a lead-out rod and an insulation sealing plug, solid ceramic parts are arranged on the inner side and the outer side of the electric heating alloy part, and low-melting-point high-fluidity liquid metal is arranged between the electric heating alloy and a ceramic material to serve as a gap filler. Through the solid ceramic liner and the ceramic sleeve, the thermal conductivity is improved, the assembly difficulty is greatly reduced, the assembly efficiency is improved, the low-melting-point and high-fluidity liquid metal is used as a gap filler between different materials, the interface thermal resistance between the different materials can be effectively reduced, the thermal conductivity of the electric heating element is improved, the boiling point of the liquid metal is high, and the electric heating element has good heat conduction performance. The volume change rate of the electric heating element is far smaller than that of gas at high temperature, the pressure in the electric heating element can be maintained within a reasonable range at high temperature, the reliability, stability and safety of the electric heating element are improved, and the service life of the electric heating element is prolonged.

The invention provides environment-friendly elastic polyester putty for a high-speed rail and a preparation method thereof.The environment-friendly elastic polyester putty for the high-speed rail comprises a component A and a component B. The component A comprises unsaturated polyester resin, titanium dioxide, hollow microspheres, a diluent monomer, a stabilizer, a dispersing agent, a flatting agent and a drier; the component B comprises peroxide, fumed silica and an ester plasticizer, the invention also provides a preparation method of the elastic polyester putty, and the prepared putty product is green and environment-friendly, is not easy to fall off, and also has excellent impact resistance, sanding property and temperature change resistance; and the requirement of long-term operation of the high-speed rail under high-speed and high-temperature-difference environment conditions can be well met.